Well-drilling tool.



s. W. SIMS. WELL DRILLING TOOL. APPLICATION FILED AUG. 4, 1913.

latented May 12, 1914.

NTTE

STEPHEN W. SIMS, 0]? LOYALTON, CALIFORNIA.

WELL-DRILLING TOOL.

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To all whom it may concern:

Be it known that I, STEPHEN W. SIMS, a citizen of the United States,residing at Loyalton, in the county of Sierra and State of California,have invented a new and useful lVcll-Drilling Tool, of which the following a specification. v

The device forming the subject matter of this application is a tooladapted to be employed in the boring of wells.

The invention aims to provide a tool of the type described which,working in a casing of a given diameter, will bore, below the foot ofthe casing a hole of greater diameter than the diameter of the casing.

The invention aimsfurther, to provide a tool of the class described,through which, in operation, water may be forced readily.

The invention aims to improve generally and to enhance the utility of,devices of that type to which the present invention appertains.

\Vith the above and other objects in view which ill appear as thedescription proceeds, the invention resides in the combina tion andarrangement of parts and in the details of construction hereinafterdescribed and. claimed, it being understood that changes in the preciseembodiment of. the invention herein disclosed can be made Within thescope hf what is claimed without departing from the spirit of theinvention.

In the accompanying drawing: Figure 1 shows the tool in side elevation,parts being broken away; Fig; 2 is a side elevation, the structure beingviewed at right angles to the showing of Fig. 1; Fig. 3 is an endelevation; F 1 is a transverse section on the line 4-4; of Fig. 1.

The tool herein disclosed is shown as comprising a shank 1, which may bethreaded at L, or adapted in any other way for con nection with themechanism whereby the tool is reciprocated and rotated. The toolcomprises a plurality of wings, the same being laterally extended fromthe axis of the shanh, the several wings being denoted by the numerals3, 4, 5 and 6. The wings 3 and e'i, as will be understood bestfrom Fi 4,lie at an obtuse angle, and the wings 5 and 6 lie in a common plane.

The lower cutting edge of the wing 3 is denoted by the numeral 7, thelower cutting edge of the wing t is denoted by the numeral 8, the lowercutting edge of the wing 5- is denoted by the numeral. 9 and the lowercut- Specification of Letters Patent.

Application filed August 4, 1913.

Patented May 12, 191 i. Serial No, 782,984.

variously formed at its lower end, but in its.

present instance the bit is shown as provided with a cutting edge 12.The lower end of the centering bit 11, however, may be varied in formwithout jeopardizing the utility of the invention. Adjacent its outer,upright edge, the wing 6 is equipped with a transverse rib 14. The loweredges 15 of the rib 14 project beyond the side faces of the lower end ofthe wing 6, as shown in Fig. 1, and are sharpened. The lateral. edges 16of the rib 14- are sharpened also. The shank 1 is provided with a bore17 which is extended into the bit 11, the bit being provided with anoutlet 18 which communicates with the bore 17. The bore 17 is providedwith other outlets 19 discharging upon the side faces'of the bit 11,above the cutting edges 7, 8, 9 and 10 of the respective wings. Theouter edges of all of the wings 3, l, 5 and 6 lie in a commoncircumference, which circumference approximates the interior diameter ofthe easing in which the tool is operated.

In practical operation, the cutting edges 7, 8, 9 and 10 of the severalwings operate upon, a reciprocation of the tool. The cutting bit 11serves to center the device and whenthe bit is rotated, the edge 10 ofthe wing 6 projecting at its outer end beyond the outer face of thecasing will. enlarge the hole below the lower end of; the casing, to adi- ,fln'ietf exceeding the external diameter of the casing. Thus,illustrating by a concrete "of the cutting edges 15 and 10 of the rib14.

\Vater may be introduced readily into the bore 17, the water finding itsway out through the ports 18 and 19, adjacent the cutting edges of therespective portions of the t .-ol.

.llaving thus described the invention, what is claimed is:

1. A well drilling tool comprising a plurality o'l radial wings and achisel-ended centering bit projecting below the lower edges of the wingsand terininatii'ig in a single pair of meeting cutting edges which liein a common plane and diverge from their point of meeting.

I 2. A well drilling tool comprising a plurality of radial wings, two ofwhich are provided at their lower ends with converging cutting edges anda centering hit projecting beyond the lower edges of the wings. the bithaving converging cutting edges alined with the converging cutting edgesof said wings.

:3. It well drilling tool comprising a plurality of radial wings, and asingle eccentric chisel-ended centering bit projecting beyond the endsof the wings and having diverging cutting edges lying in a common plane.

1. A well drilling tool comprising a plurality of lateral wings havingstraight cut ting edges, the outer ends of which 'lie in a commoncircumference, and a centering bit projecting beyond the ends of thewings and disposed eccentrically of said circumference, thestraight'cutting edges extending unbrolienly inward to the bit.

5. A well drilling tool comprising a plurality of radial wings havingchisel shaped cutting edges lying in a common plane and a single,eccentric centering bit projecting beyond the ends of the wings, thetransverse cutting edge of one wing being longer than the transversecutting edge of the other wing.

(5. A well drilling tool comprising a plurality of lateral wings havingchisel shaped cutting edges lying in a common plane the outer ends ofsaid edges lying in a common circumference, and a centering hitprojecting beyond the edges of the wings and disposed eccentrically ofsaid circumference, the transverse cutting edge of one wing being longerthan the transverse cutting edges of the other wings.

obtusely disposed wings, the cuti 7. A well drilling tool comprising aelurality of lateral wings and a single, k trio, centering bitprojecting heyoncc the ends of the wings, the transverse cutting edge ofone wing being longer than the transverse cutting edge of the otherwing, said wing being provided along its outer edge with a transverserih, the end or which is sharpened.

8. A well drilling tool comprising a plurality of lateral rings and asingle, eccentric, centering bit projecting beyond the ends of thewings, the transverse cutting edge of one wing being longer than thetransverse cutting edges of the other wings, said wing being provided atits outer edge with a transverse cutting rib, the lateral edges of whichare sharpened.

9. A well drilling tool comprising a pin rality of lateral wings and asingle, eccentric, centering hit projecting beyond the ends of thewings, the transverse cutting edge of one wing being longer than thetransverse cutting edges of the other wings, said wing be; V providedalong its enter edge with a transverse rib, the end of which, and onelateral edge of which is shargi iened.

10. A well drilling tool comprising a pair of oppositely disposed wingsand pair of wings disposed at an obtuse angle to each other, the wingsof the respective pairs terminating in straight, inwardly extendedcutting edges, and a depending, centering bit projecting below thewings, the centering bit comprising angularly disposed parts, alinedwith the obtusely disposed wings, said parts terminating in angular-1ydisposed edges, alined with the cutting edges oi the ng edge oi onemember of the nrst specified pair of -wings being longer than thecutting edge of the other wing of said pair.

' In testimony that l claim the ioregoing as my own, I have heretoailixed my signature in the presence at two witnesses.

STlilHlEll ll Slliil.

W'itnesses: V

A. ll. Y l 'riiawny, dons Fin.

